EP0490080A1 - Apparatus for the incorporation of a filter element - Google Patents

Apparatus for the incorporation of a filter element Download PDF

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Publication number
EP0490080A1
EP0490080A1 EP91118867A EP91118867A EP0490080A1 EP 0490080 A1 EP0490080 A1 EP 0490080A1 EP 91118867 A EP91118867 A EP 91118867A EP 91118867 A EP91118867 A EP 91118867A EP 0490080 A1 EP0490080 A1 EP 0490080A1
Authority
EP
European Patent Office
Prior art keywords
filter element
holding
pressing member
filter
sealing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91118867A
Other languages
German (de)
French (fr)
Other versions
EP0490080B1 (en
Inventor
Norbert Sann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hydac Filtertechnik GmbH
Original Assignee
Hydac Filtertechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hydac Filtertechnik GmbH filed Critical Hydac Filtertechnik GmbH
Publication of EP0490080A1 publication Critical patent/EP0490080A1/en
Application granted granted Critical
Publication of EP0490080B1 publication Critical patent/EP0490080B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
    • B01D35/0276—Filtering elements with a vertical rotation or symmetry axis mounted on tanks or reservoirs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/114—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/30—Filter housing constructions
    • B01D2201/301—Details of removable closures, lids, caps, filter heads
    • B01D2201/305—Snap, latch or clip connecting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4084—Snap or Seeger ring connecting means

Definitions

  • the invention relates to a device for accommodating a filter element in a housing part, which has an inlet and outlet opening for a fluid and a seat on the latter, to which the filter element can be pressed by means of a holding device which has a pressing member which can be placed on a contact surface of the filter element.
  • a sealing element on the seat separates the unfiltered fluid from the filtered and the housing part with an area of its outer wall is sealingly in contact with a receiving body via a second sealing element, which can be fastened in a sealing connection to a wall of a container by means of a third sealing element and associated holding elements.
  • Devices of this type can preferably be used in hydraulic systems.
  • one or more filter elements are installed in the assigned container, for example in a tank for hydraulic fluid, as a return filter for the hydraulic fluid.
  • the filter elements can be filter cartridges that can be replaced when dirty.
  • a contamination indicator device can also be present.
  • Devices of this type can also be used advantageously, for example, in fuel or lubricant filters which are provided for tank installation.
  • the invention has for its object to provide a device of the type in question, in which a proper position of the filter element is guaranteed within the housing part receiving it.
  • the pressing member of the holding device has at least one stop surface which can be brought into a form-fitting engagement with a counter surface formed on the contact surface of the filter element in order to secure the filter element against rotation relative to Form housing part.
  • any rotational movement of the filter element relative to the housing part is precluded by the anti-rotation lock designed according to the invention on the holding device and cooperating with the filter element, with positive engagement between stop surfaces on the holding device and associated counter surfaces of the filter element.
  • the anti-rotation lock designed according to the invention on the holding device and cooperating with the filter element, with positive engagement between stop surfaces on the holding device and associated counter surfaces of the filter element.
  • the invention ensures that the filter element is properly secured in position, which ensures that a perfect seal between the filter element and the seat on the housing part is maintained under all operating conditions.
  • the filter element which can be accommodated in the housing part can preferably be detachably connected to the housing part by means of the holding device.
  • the pressing member of the holding device can be secured by means of one or more of the holding elements which serve to fasten the receiving body for the housing part in which the filter element is accommodated.
  • the pressing member can thus be secured, for example, by means of the same nuts that also serve to fix the position of the receiving body.
  • the pressing member can also be connected to the receiving body, for example pivotally mounted on the receiving body by means of a hinge-like connection.
  • a container lid provided on the container can instead have on its inside the pressing member of the holding device, which in this case is designed so that it presses on the filter element when the container lid is attached to the container in its closed position, and the filter element is released when lifting the container lid.
  • FIG. 1 and 2 show a first exemplary embodiment of a return flow filter device of a hydraulic system, wherein a plurality of filter elements 1 are installed together in a container, which is a tank 3 for hydraulic fluid, a larger part of which is shown in FIG Outline can be seen.
  • 2 shows the tank 3 without an upper cover, which (see FIG. 1) is designed as a flat container lid 5 which can be fastened by means of fastening screws 6 to a flat sealing surface 7 which extends continuously along the upper edge region of the tank 3. With the cover 5 removed, the filter elements 1 are freely accessible from above in the area of their upper end faces 37, as shown in FIG.
  • the filter elements 1 can be replaceable, cartridge-like filters of conventional design, the filter medium, for example paper fleece, wire cloth or the like, being adapted to the respective operating fluid and the operating pressure in question.
  • Each filter element 1, which in the exemplary embodiment is largely circular-cylindrical, is located in its own housing part in the form of a filter bowl 9, which is adapted in shape and dimension to the filter element 1 in the usual manner, that is to say also essentially in the present case forms circular cylindrical body.
  • the filter bowl 9 is open at its one, overhead end 11. At the opposite, lower end 12, the filter bowl 9 is closed, but has a central outlet opening 13 for the outlet of the cleaned fluid. At the outer opening edge, the outlet opening 13 forms a seat 15 on which the facing end face of the filter element 1 is supported, a sealing element 16 sealing the end outlet of the inner cavity of the filter element 1 with respect to the seat 15.
  • This area lies above an inner wall 17 arranged horizontally in the tank 3, which forms a continuous partition between the upper tank area for contaminated fluid and the lower area for cleaned fluid.
  • the inner wall 17 has a circular opening 19 for each filter bowl 9, into which the filter bowl 9 in question can be inserted from above when the upper cover 5 is removed. In its end position after insertion, the upper open end 11 of the filter bowl 9 is located somewhat above the inner wall 17, so that the inlet opening of the filter bowl 9 opens into the region of the contaminated fluid inside the tank 3.
  • a receiving body in the form of an annular body 21 is located at the opening edge of the opening 19 of the inner wall 17, in the ring opening of which the outer edge region of the upper end 11 of the filter bowl 9 is received.
  • the latter has a flange-like extension 23 at the upper end 11.
  • the extension 23 with its inner shoulder surface is in contact with an annular shoulder 25, which is formed by a step at the ring opening of the annular body 21.
  • an annular groove is incorporated into the peripheral surface of the flange-like extension 23, in which sits a sealing element in the form of a sealing ring 27, which ensures the sealing against the facing inner surface of the ring body 21.
  • the ring body 21 in turn is fixed to the inner wall 17 with the aid of a plurality of holding elements which are distributed around the circumference of the ring body 21 at regular angular intervals.
  • fastening screws are provided as holding elements, more specifically, three threaded bolts 31 for each ring body 21.
  • the threaded bolts 31 are welded at each end to the top of the inner wall 17, so that they form vertical stud bolts on the top of the inner wall 17, which have suitable holes 29 reach through in the ring body 21.
  • Nuts 33 screwed onto the protruding threaded section of the threaded bolts 31 clamp the ring body 21 on the upper side of the inner wall 17.
  • a sealing ring 35 in an annular groove which is formed in the surface of the ring body 21 facing the inner wall 17 concentrically to the ring opening forms the seal between the ring body 21 and inner wall 17.
  • the filter element 1 At its upper end 37 adjacent to the open end 11 of the filter bowl 9, the filter element 1 has a centrally located circular-cylindrical projection 39 and two wing-like tongues 40 which, on diametrically opposite sides of the projection 39, differ from the latter in relation to the longitudinal axis of the filter element 1, extend in the radial direction.
  • the filter element 1 cooperates on its end face 37 with a holding device which presses the filter element 1 at the lower end 12 against the seat 15 in the filter bowl 9.
  • a pressing member in the form of a holding bracket 41 made of sheet metal is provided to generate this contact pressure, one end of which is pivotably mounted on the ring body 21 via a hinge 43.
  • the bracket 41 In its working position placed on the end face 37 of the filter element 1, the bracket 41 extends parallel to the inner wall 17 across the end face 37 and is secured with its other end opposite the hinge 43 by a nut 33 on one of the threaded bolts 31, which also serves to form a holding element for the ring body 21.
  • the part of the holding bracket 41 which overlaps the end face 37 of the filter element 1 has a central recess 45 (see FIG. 2) for the passage of the projection 39 and slot openings 46 which open into the recess 45 and extend in the longitudinal direction of the holding bracket 41 and which are suitable for the Engagement of the tongues 40 on the end face 37 of the filter element 1 are determined.
  • the filter elements 1 are accessible on their exposed upper end face 37.
  • the relevant holding bracket 41 can be lifted off the end face 37 by pivoting about the axis of the hinge 43.
  • the filter element 1 can now be lifted upwards.
  • the retaining bracket 41 and lifting the contact pressure, which is transmitted to the filter bowl 9 via the seat 15 the latter can also be moved upward, for example for the purpose of cleaning, the flange-like extension 23 of the filter bowl 9 moving away from the annular shoulder 25 on the ring body 21.
  • each filter bowl 9 is provided with a support bracket 47 which is pivotally mounted in raised side edge sections 49 which are formed opposite one another on the filter bowl 9 at the upper end 11.
  • each retaining bracket 41 form stop surfaces which, in cooperation with the tongues 40 of the filter element 1 engaging in them, form an anti-rotation device for the latter in order to prevent rotation of the filter element 1 about its longitudinal axis.
  • the opening 19 in the inner wall 17 of the tank 3 can be made somewhat larger than the diameter of the ring opening of the ring body 21.
  • the ring body 21 forms the actual receptacle in which the filter bowl 9 is formed the seal is included. Therefore, only the ring body 21 needs to be machined and positioned particularly precisely.
  • the nut 33 used to secure the retaining bracket 41 in the working position applied to the end face 37 of the filter element 1, like the nuts fixing the ring body 21, is designed as a normal hexagon nut. That mother, which has to be loosened for lifting and putting on the holding bracket 41, can, however, also be secured captively by an additional device. An embodiment suitable for this is described below with reference to an exemplary embodiment shown in FIG.
  • the retaining bracket 41 could also be fixed to a retaining element of the ring body 21 at both ends.
  • the exemplary embodiment shown in FIG. 3 differs from the first described exemplary embodiment only in the design of the holding device which secures the filter element 1 and the filter bowl 9.
  • this holding device has a pressing member in the form of a pressure piece 51 fastened to the inside of the upper container lid 5.
  • the pressure piece 51 acts in a centering manner on the projection 39 of the filter element 1 lying opposite it.
  • Noses 52 projecting from the pressure piece 51 outside the end face of the projection 39 receive the tongues 40 on the end face 37 of the filter element 1 in a slot opening 50 between them in order to form the anti-rotation device for the filter element 1.
  • FIG. 4 shows an embodiment with a holding device, the pressing member of which is designed as a holding bracket 41 as in the example of FIGS. 1 and 2.
  • the nut to be loosened for lifting the retaining bracket 41 is not designed here as a hexagon nut, but rather a special nut 55 which is provided with an annular handle 53 so that it can be rotated manually like a wing nut.
  • the nut 55 is captively secured by means of a safety chain 57.
  • One end of the chain 57 is attached to the bracket 41.
  • the other end of the chain 57 is fixed to an annular disc 58 which, like a circlip but rotatable, sits in an annular groove in the nut 55.
  • FIG. 5 to 7 show an embodiment in which there is none as the receiving body in which the filter bowl 9 is received with its end-like, flange-like extension 23 Ring body made of metal, but an annular body 61 made of glass fiber reinforced plastic is provided.
  • threaded bolts 31 with nuts 33 are provided as holding elements for the annular body 61.
  • the annular body 61 not only has a sealing ring 35 for the sealing against the inner wall 17, in accordance with the previously described exemplary embodiments, but the annular body 61 forms with its tapered outer peripheral region a sealing lip 62 which bears against the inner wall 17 under prestress.
  • the holding device has as a pressing member a holding bracket 71 which, like the ring body 61, is made of glass fiber reinforced plastic and is fixed at one end to one of the threaded bolts 31 by means of the nut 33.
  • the area of the mounting bracket 71 adjacent to this attachment point can be bent sufficiently to form a bending hinge 64, so that the mounting bracket can be pivoted for placement against the end face 37 of the filter element 1 and for lifting it off.
  • the end of the holding bracket 71 opposite the bending hinge 64 can be fixed on the associated, raised edge section 72 of the ring body 61 by means of a plug-in spring 73.
  • This is bent approximately into a hairpin shape and has a straight spring leg 74 which can be inserted into openings 75 and 76 in the holding bracket 71 or in the ring body 61, as shown in FIG.
  • This figure also shows that the second spring leg 77 engages in a groove 78 of the bracket 71, wherein it rests with spring force on the bottom of the groove, so that the plug spring 73 is non-positively secured in the inserted state.
  • the holding bracket 71 is shaped like the holding bracket 41 in the first described example, ie it has a central recess 45 for the reception of the projection 39 of the filter element 1 and slot openings 46 opening into the recess 45, into which the tongues 40 of the filter element 1 engage, so that an anti-rotation device is formed.
  • FIG. 8 shows an exemplary embodiment in which the holding bracket 71 is connected to the associated raised edge section of the ring body 61 by means of a snap lock.
  • This consists of a locking surface 82 on the ring body 61, which is engaged by a locking projection on a flexible locking lug 83 of the retaining bracket 71 when the retaining bracket 71 is brought into the locking position shown in FIG. In this locking position, the edge of the ring body 71 is received between the locking lug 83 and an abutment 84, which is integrally formed on the bracket 71.
  • the locking engagement is released by applying a force in the lifting direction at the outer end 85 of the holding bracket 71, whereby only the outer end portion of the holding bracket 71 bends due to the support on the abutment 84, so that the locking lug 83 with its projection out of engagement with the locking surface 82 is coming.
  • FIG. 9 shows an embodiment in which the end of the holding bracket 71 opposite the bending hinge is fixed on one of the threaded bolts 31 by means of a knurled nut 91.
  • the knurling on the circumference of the knurled nut 91 engages with a latching tongue 92, which is formed on the upper side of the holding bracket 71 and, due to its flexibility, forms a non-positive locking device for the knurled nut 91.

Abstract

2. In an apparatus which is designed for the incorporation of a filter element 1, which is located in a housing component 9, the outer wall of which is positioned against a receiving body 21 in a sealing manner, the latter is fixed to an interior wall 17 of the holder 3 by means of a sealing connection. This sealing connection is provided with a sealing element 35 introduced between sealing surfaces of the receiving body 21 and the interior wall 17. A holding device for fixing the position of the filter element 1 in the housing component 9 is provided with a pressing member 41, which, by engaging with the filter element 1, secures this against a rotary movement relative to the housing component 9. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Aufnahme eines Filterelementes in einem Gehäuseteil, der eine Eintritts- und Austrittsöffnung für ein Fluid und an letzterer einen Sitz aufweist, an den das Filterelement mittels einer Haltevorrichtung andrückbar ist, die ein an eine Anlagefläche des Filterelements anlegbares Andrückglied aufweist, wobei ein Dichtelement am Sitz das ungefilterte Fluid vom gefilterten trennt und der Gehäuseteil mit einem Bereich seiner Außenwandung über ein zweites Dichtelement dichtend in Anlage mit einem Aufnahmekörper ist, der mittels eines dritten Dichtelements und zugehöriger Halteelemente in abdichtender Verbindung an einer Wand eines Behälters befestigbar ist.The invention relates to a device for accommodating a filter element in a housing part, which has an inlet and outlet opening for a fluid and a seat on the latter, to which the filter element can be pressed by means of a holding device which has a pressing member which can be placed on a contact surface of the filter element. wherein a sealing element on the seat separates the unfiltered fluid from the filtered and the housing part with an area of its outer wall is sealingly in contact with a receiving body via a second sealing element, which can be fastened in a sealing connection to a wall of a container by means of a third sealing element and associated holding elements.

Vorrichtungen dieser Art (DE-OS 19 09 130) sind bevorzugt bei Hydraulikanlagen einsetzbar. Bei solchen Anwendungen ist ein Filterelement oder sind mehrere Filterelemente im zugeordneten Behälter, beispielsweise in einem Tank für Hydraulikflüssigkeit, als Rücklauffilter für die Hydraulikflüssigkeit eingebaut. Bei den Filterelementen kann es sich um bei Verschmutzung auszuwechselnde Filterpatronen handeln. Zusätzlich kann auch eine Verschmutzungs-Anzeigeeinrichtung vorhanden sein. Derartige Vorrichtungen sind beispielsweise auch bei Kraftstoff- oder Schmierstoffiltern vorteilhaft einsetzbar, die für den Tankeinbau vorgesehen sind.Devices of this type (DE-OS 19 09 130) can preferably be used in hydraulic systems. In such applications, one or more filter elements are installed in the assigned container, for example in a tank for hydraulic fluid, as a return filter for the hydraulic fluid. The filter elements can be filter cartridges that can be replaced when dirty. In addition, a contamination indicator device can also be present. Devices of this type can also be used advantageously, for example, in fuel or lubricant filters which are provided for tank installation.

Bei bekannten Vorrichtungen der eingangs erwähnten Art ergeben sich im Betrieb in vielen Fällen Schwierigkeiten, und zwar insbesondere bei Anwendungsfällen, bei denen das betreffende Fluid mit verhältnismäßig hoher Durchflußrate das Filterelement durchströmt. Durch die hierbei am Filterelement angreifenden hohen Strömungskräfte kommt es vielfach zu unerwünschten Bewegungen des Filterelementes relativ zu dem es aufnehmenden Gehäuseteil, wodurch u.a. auch die Abdichtung zwischen dem Filterelement und seinem Sitz am Gehäuseteil beeinträchtigt wird.In known devices of the type mentioned in the introduction, difficulties arise in operation in many cases, in particular in applications in which the fluid in question flows through the filter element at a relatively high flow rate. Due to the high flow forces acting on the filter element, undesired movements of the filter element relative to the housing part accommodating it often occur, the seal between the filter element and its seat on the housing part is impaired.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der in Betracht stehenden Art zu schaffen, bei der eine einwandfreie Lagesicherung des Filterelementes innerhalb des ihn aufnehmenden Gehäuseteiles gewährleistet ist.The invention has for its object to provide a device of the type in question, in which a proper position of the filter element is guaranteed within the housing part receiving it.

Diese Aufgabe ist erfindungsgemäß bei einer Vorrichtung der eingangs genannten Art dadurch gelöst, daß das Andrückglied der Haltevorrichtung mindestens eine Anschlagfläche aufweist, die in einen formschlüssigen Eingriff mit einer an der Anlagefläche des Filterelementes ausgebildeten Gegenfläche bringbar ist, um eine Sicherung des Filterelementes gegen Verdrehung relativ zum Gehäuseteil zu bilden.This object is achieved in a device of the type mentioned in that the pressing member of the holding device has at least one stop surface which can be brought into a form-fitting engagement with a counter surface formed on the contact surface of the filter element in order to secure the filter element against rotation relative to Form housing part.

Durch die erfindungsgemäß an der Haltevorrichtung ausgebildete, mit dem Filterelement zusammenwirkende Verdrehsicherung mit formschlüssigem Eingriff zwischen Anschlagflächen an der Haltevorrichtung und zugeordneten Gegenflächen des Filterelementes wird jegliche Drehbewegung des Filterelementes relativ zum Gehäuseteil ausgeschlossen. Wie man weiß, führen gerade Drehbewegungen des Filterelementes, wie sie bei den bekannten Vorrichtungen bei höheren Durchflußraten auftreten, zu besonderen Beeinträchtigungen der Betriebssicherheit der gesamten Hydraulikanlage.Any rotational movement of the filter element relative to the housing part is precluded by the anti-rotation lock designed according to the invention on the holding device and cooperating with the filter element, with positive engagement between stop surfaces on the holding device and associated counter surfaces of the filter element. As is known, rotary movements of the filter element, as occur in the known devices at higher flow rates, lead to particular impairments of the operational safety of the entire hydraulic system.

Die Erfindung gewährleistet demgegenüber eine einwandfreie Lagesicherung des Filterelements, wodurch erreicht wird, daß unter allen Betriebsbedingungen eine einwandfreie Abdichtung zwischen Filterelement und dem Sitz am Gehäuseteil aufrechterhalten bleibt.In contrast, the invention ensures that the filter element is properly secured in position, which ensures that a perfect seal between the filter element and the seat on the housing part is maintained under all operating conditions.

Das im Gehäuseteil aufnehmbare Filterelement ist vorzugsweise mittels der Haltevorrichtung lösbar mit dem Gehäuseteil verbindbar. Das Andrückglied der Haltevorrichtung kann mittels einem oder mehreren der Halteelemente gesichert sein, die der Befestigung des Aufnahmekörpers für den Gehäuseteil dienen, in dem das Filterelement untergebracht ist. Bei Verwendung von Halteelementen in Form von an der Innenwand des Behälters befestigten Gewindebolzen kann das Andrückglied also beispielsweise mittels der gleichen Muttern gesichert sein, die auch zur Lagefixierung des Aufnahmekörpers dienen. Das Andrückglied kann auch mit den Aufnahmekörper verbunden sein, beispielsweise mittels einer scharnierartigen Verbindung schwenkbar an Aufnahmekörper gelagert sein.The filter element which can be accommodated in the housing part can preferably be detachably connected to the housing part by means of the holding device. The pressing member of the holding device can be secured by means of one or more of the holding elements which serve to fasten the receiving body for the housing part in which the filter element is accommodated. When using holding elements in the form of threaded bolts fastened to the inner wall of the container, the pressing member can thus be secured, for example, by means of the same nuts that also serve to fix the position of the receiving body. The pressing member can also be connected to the receiving body, for example pivotally mounted on the receiving body by means of a hinge-like connection.

Bei einem anderen Ausführungsbeispiel kann statt dessen ein am Behälter vorgesehener Behälterdeckel an seiner Innenseite das Andrückglied der Haltevorrichtung aufweisen, das in diesem Falle so ausgebildet ist, daß es auf das Filterelement drückt, wenn der Behälterdeckel in seiner Schließstellung am Behälter angebracht ist, und das Filterelement beim Abheben des Behälterdeckels freigegeben ist.In another embodiment, a container lid provided on the container can instead have on its inside the pressing member of the holding device, which in this case is designed so that it presses on the filter element when the container lid is attached to the container in its closed position, and the filter element is released when lifting the container lid.

Nachstehend ist die Erfindung anhand von in der Zeichnung dargestellten Ausführungsbeispielen im einzelnen erläutert.The invention is explained in detail below on the basis of exemplary embodiments shown in the drawing.

Es zeigen:

Fig.1
einen abgebrochen gezeichneten Teillängsschnitt eines Ausführungsbeispiels der Vorrichtung;
Fig.2
eine Draufsicht des Ausführungsbeispiels, wobei jedoch ein Behälterdeckel weggelassen ist;
Fig.3
ein gegenüber Fig.1 und 2 in größerem Maßstab gezeichneter Teillängsschnitt eines abgewandelten Ausführungsbeispiels;
Fig.4
einen in noch größerem Maßstab und nur ausschnittsweise gezeichneten Längsschnitt eines Halteelements für die Verwendung bei einer Abwandlung des Ausführungsbeispiels gemäß Fig.1 und 2;
Fig.5
einen Längsschnitt eines Aufnahmekörpers und eines Haltebügels für ein weiteres Ausführungsbeispiel, wobei der Haltebügel in abgehobener Stellung gezeigt ist;
Fig.6
einen Längsschnitt entsprechend Fig.5, wobei der Haltebügel in an ein Filterelement angelegter Stellung gezeigt ist;
Fig.7
eine Draufsicht auf das in Fig.6 Gezeigte und
Fig.8 und 9
abgebrochen gezeichnete Teillängsschnitte von Aufnahmekörpern und Haltebügeln weiterer Ausführungsbeispiele der Vorrichtung.
Show it:
Fig. 1
a broken partial longitudinal section of an embodiment of the device;
Fig. 2
a plan view of the embodiment, but with a container lid is omitted;
Fig. 3
a compared to Figures 1 and 2 drawn on a larger scale partial longitudinal section of a modified embodiment;
Fig. 4
an even larger scale and only partially drawn longitudinal section of a holding element for use in a modification of the embodiment of Figures 1 and 2;
Fig. 5
a longitudinal section of a receiving body and a bracket for a further embodiment, wherein the bracket is shown in the raised position;
Fig. 6
a longitudinal section corresponding to Figure 5, wherein the bracket is shown in a position applied to a filter element;
Fig. 7
a plan view of that shown in Fig.6 and
Fig. 8 and 9
broken-off drawn partial longitudinal sections of receiving bodies and holding brackets of further exemplary embodiments of the device.

Fig.1 und 2 zeigen ein erstes Ausführungsbeispiel für eine Rücklauf-Filtereinrichtung einer Hydraulikanlage, wobei mehrere Filterelemente 1 gemeinsam in einen Behälter eingebaut sind, bei dem es sich um einen Tank 3 für Hydraulikflüssigkeit handelt, von dem in Fig.2 ein größerer Teil seines Umrisses zu sehen ist. Fig.2 zeigt den Tank 3 ohne obere Abdeckung, die (siehe Fig.1) als flacher Behälterdeckel 5 ausgebildet ist, der mittels Befestigungsschrauben 6 an einer ebenen Dichtfläche 7 befestigbar ist, die sich durchgehend längs des oberen Randbereichs des Tanks 3 erstreckt. Bei abgenommenem Deckel 5 sind die Filterelemente 1 im Bereich ihrer oberen Stirnseiten 37 von oben her frei zugänglich, wie es Fig.2 zeigt.1 and 2 show a first exemplary embodiment of a return flow filter device of a hydraulic system, wherein a plurality of filter elements 1 are installed together in a container, which is a tank 3 for hydraulic fluid, a larger part of which is shown in FIG Outline can be seen. 2 shows the tank 3 without an upper cover, which (see FIG. 1) is designed as a flat container lid 5 which can be fastened by means of fastening screws 6 to a flat sealing surface 7 which extends continuously along the upper edge region of the tank 3. With the cover 5 removed, the filter elements 1 are freely accessible from above in the area of their upper end faces 37, as shown in FIG.

Die Filterelemente 1 können auswechselbare, patronenartige Filter üblicher Bauart sein, wobei das Filtermedium, beispielsweise Papiervlies, Drahtgewebe od.dgl., an das jeweilige Betriebsfluid und den in Frage kommenden Betriebsüberdruck angepaßt ist. Jedes Filterelement 1, das beim Ausführungsbeispiel im großen und ganzen kreiszylinderförmig ist, befindet sich in einem eigenen Gehäuseteil in Form eines Filtertopfes 9, der in Form und Abmessung in der üblichen Weise an das Filterelement 1 angepaßt ist, also im vorliegenden Fall einen ebenfalls im wesentlichen kreiszylindrischen Körper bildet. Der Filtertopf 9 ist an seinem einen, obenliegenden Ende 11 offen. An gegenüberliegenden, unteren Ende 12 ist der Filtertopf 9 geschlossen, weist jedoch eine zentrale Austrittsöffnung 13 für den Austritt des gereinigten Fluids auf. Am äußeren Öffnungsrand bildet die Austrittsöffnung 13 einen Sitz 15, an dem die zugekehrte Stirnseite des Filterelements 1 abgestützt ist, wobei ein Dichtelement 16 den endseitigen Auslaß des inneren Hohlraums des Filterelementes 1 gegenüber dem Sitz 15 abdichtet.The filter elements 1 can be replaceable, cartridge-like filters of conventional design, the filter medium, for example paper fleece, wire cloth or the like, being adapted to the respective operating fluid and the operating pressure in question. Each filter element 1, which in the exemplary embodiment is largely circular-cylindrical, is located in its own housing part in the form of a filter bowl 9, which is adapted in shape and dimension to the filter element 1 in the usual manner, that is to say also essentially in the present case forms circular cylindrical body. The filter bowl 9 is open at its one, overhead end 11. At the opposite, lower end 12, the filter bowl 9 is closed, but has a central outlet opening 13 for the outlet of the cleaned fluid. At the outer opening edge, the outlet opening 13 forms a seat 15 on which the facing end face of the filter element 1 is supported, a sealing element 16 sealing the end outlet of the inner cavity of the filter element 1 with respect to the seat 15.

Das obere Ende 11 des Filtertopfes 9, das die Eintrittsöffnung für das zu reinigende Fluid bildet, mündet in denjenigen Bereich des Tankes 3, in dem sich das verschmutzte Fluid befindet. Dieser Bereich liegt oberhalb einer im Tank 3 horizontal angeordneten Innenwand 17, die eine durchgehende Trennwand zwischen dem oberen Tankbereich für verschmutztes Fluid und dem unteren Bereich für gereinigtes Fluid bildet. Die Innenwand 17 weist für jeden Filtertopf 9 einen kreisrunden Durchbruch 19 auf, in den der betreffende Filtertopf 9 bei abgenommenem oberen Deckel 5 von oben her einsetzbar ist. In seiner Endlage nach dem Einsetzen befindet sich das obere offene Ende 11 des Filtertopfes 9 etwas oberhalb der Innenwand 17, so daß die Eintrittsöffnung des Filtertopfes 9 in den Bereich des verunreinigten Fluids innerhalb des Tanks 3 mündet.The upper end 11 of the filter bowl 9, which forms the inlet opening for the fluid to be cleaned, opens into that region of the tank 3 in which the contaminated fluid is located. This area lies above an inner wall 17 arranged horizontally in the tank 3, which forms a continuous partition between the upper tank area for contaminated fluid and the lower area for cleaned fluid. The inner wall 17 has a circular opening 19 for each filter bowl 9, into which the filter bowl 9 in question can be inserted from above when the upper cover 5 is removed. In its end position after insertion, the upper open end 11 of the filter bowl 9 is located somewhat above the inner wall 17, so that the inlet opening of the filter bowl 9 opens into the region of the contaminated fluid inside the tank 3.

Für die Festlegung der Endlage des Filtertopfes 9 relativ zur Innenwand 17 befindet sich am Öffnungsrand des Durchbruchs 19 der Innenwand 17 ein Aufnahmekörper in Form eines Ringkörpers 21, in dessen Ringöffnung der Außenrandbereich des oberen Endes 11 des Filtertopfes 9 aufgenommen ist.To determine the end position of the filter bowl 9 relative to the inner wall 17, a receiving body in the form of an annular body 21 is located at the opening edge of the opening 19 of the inner wall 17, in the ring opening of which the outer edge region of the upper end 11 of the filter bowl 9 is received.

Letzterer weist am oberen Ende 11 eine flanschartige Erweiterung 23 auf. In der Endlage des Filtertopfes 9 ist die Erweiterung 23 mit ihrer inneren Schulterfläche in Anlage an einer Ringschulter 25, die durch eine Stufe an der Ringöffnung des Ringkörpers 21 gebildet ist. Zur Abdichtung der Außenwandung des Filtertopfes 9 gegenüber dem Ringkörper 21 ist in die Umfangsfläche der flanschartigen Erweiterung 23 eine Ringnut eingearbeitet, in der ein Dichtelement in Form eines Dichtringes 27 sitzt, der die Abdichtung gegenüber der zugekehrten Innenfläche des Ringkörpers 21 sicherstellt.The latter has a flange-like extension 23 at the upper end 11. In the end position of the filter bowl 9, the extension 23 with its inner shoulder surface is in contact with an annular shoulder 25, which is formed by a step at the ring opening of the annular body 21. To seal the outer wall of the filter bowl 9 with respect to the ring body 21, an annular groove is incorporated into the peripheral surface of the flange-like extension 23, in which sits a sealing element in the form of a sealing ring 27, which ensures the sealing against the facing inner surface of the ring body 21.

Der Ringkörper 21 seinerseits ist mit Hilfe mehrerer Halteelemente, die rings um den Umfang des Ringkörpers 21 in regelmäßigen Winkelabständen verteilt sind, an der Innenwand 17 festgelegt. Beim Ausführungsbeispiel sind Befestigungsschrauben als Halteelemente vorgesehen, genauer gesagt, jeweils drei Gewindebolzen 31 für jeden Ringkörper 21. Die Gewindebolzen 31 sind je endseits mit der Oberseite der Innenwand 17 verschweißt, so daß sie an der Oberseite der Innenwand 17 vertikale Stehbolzen bilden, die passende Bohrungen 29 im Ringkörper 21 durchgreifen. Auf den überstehenden Gewindeabschnitt der Gewindebolzen 31 aufgeschraubte Muttern 33 spannen den Ringkörper 21 an der Oberseite der Innenwand 17. Ein Dichtring 35 in einer Ringnut, die in der der Innenwand 17 zugekehrten Fläche des Ringkörpers 21 konzentrisch zur Ringöffnung ausgebildet ist, bildet die Abdichtung zwischen Ringkörper 21 und Innenwand 17.The ring body 21 in turn is fixed to the inner wall 17 with the aid of a plurality of holding elements which are distributed around the circumference of the ring body 21 at regular angular intervals. In the exemplary embodiment, fastening screws are provided as holding elements, more specifically, three threaded bolts 31 for each ring body 21. The threaded bolts 31 are welded at each end to the top of the inner wall 17, so that they form vertical stud bolts on the top of the inner wall 17, which have suitable holes 29 reach through in the ring body 21. Nuts 33 screwed onto the protruding threaded section of the threaded bolts 31 clamp the ring body 21 on the upper side of the inner wall 17. A sealing ring 35 in an annular groove which is formed in the surface of the ring body 21 facing the inner wall 17 concentrically to the ring opening forms the seal between the ring body 21 and inner wall 17.

An seiner oberen, dem offenen Ende 11 des Filtertopfes 9 benachbarten Stirnseite 37 weist das Filterelement 1 einen zentral gelegenen kreiszylinderförmigen Vorsprung 39 und zwei flügelartige Zungen 40 auf, die an einander diametral gegenüberliegenden Seiten des Vorsprungs 39 sich von diesem, bezogen auf die Längsachse des Filterelements 1, in Radialrichtung erstrecken. Das Filterelement 1 wirkt an seiner Stirnseite 37 mit einer Haltevorrichtung zusammen, die das Filterelement 1 am unteren Ende 12 an den Sitz 15 im Filtertopf 9 anpreßt. Bein gezeigten Ausführungsbeispiel ist zum Erzeugen dieser Anpreßkraft ein Andrückglied in Form eines aus Blech gefertigten Haltebügels 41 vorgesehen, dessen eines Ende über ein Scharnier 43 am Ringkörper 21 schwenkbar gelagert ist. Der Bügel 41 erstreckt sich in seiner an die Stirnseite 37 des Filterelements 1 angelegten Arbeitsstellung parallel zur Innenwand 17 quer über die Stirnseite 37 und ist mit seinem dem Scharnier 43 entgegengesetzten anderen Ende durch eine Mutter 33 auf einem der Gewindebolzen 31 gesichert, der auch zur Bildung eines Halteelements für den Ringkörper 21 dient. Der die Stirnseite 37 des Filterelements 1 übergreifende Teil des Haltebügels 41 weist eine zentrale Ausnehmung 45 (siehe Fig.2) für den Durchtritt des Vorsprungs 39 sowie in die Ausnehmung 45 einmündende, sich in Längsrichtung des Haltebügels 41 erstreckende Schlitzöffnungen 46 auf, die für den Eingriff der Zungen 40 an der Stirnseite 37 des Filterelementes 1 bestimmt sind.At its upper end 37 adjacent to the open end 11 of the filter bowl 9, the filter element 1 has a centrally located circular-cylindrical projection 39 and two wing-like tongues 40 which, on diametrically opposite sides of the projection 39, differ from the latter in relation to the longitudinal axis of the filter element 1, extend in the radial direction. The filter element 1 cooperates on its end face 37 with a holding device which presses the filter element 1 at the lower end 12 against the seat 15 in the filter bowl 9. In the exemplary embodiment shown, a pressing member in the form of a holding bracket 41 made of sheet metal is provided to generate this contact pressure, one end of which is pivotably mounted on the ring body 21 via a hinge 43. In its working position placed on the end face 37 of the filter element 1, the bracket 41 extends parallel to the inner wall 17 across the end face 37 and is secured with its other end opposite the hinge 43 by a nut 33 on one of the threaded bolts 31, which also serves to form a holding element for the ring body 21. The part of the holding bracket 41 which overlaps the end face 37 of the filter element 1 has a central recess 45 (see FIG. 2) for the passage of the projection 39 and slot openings 46 which open into the recess 45 and extend in the longitudinal direction of the holding bracket 41 and which are suitable for the Engagement of the tongues 40 on the end face 37 of the filter element 1 are determined.

Die Funktionsweise des Ausführungsbeispiels ist folgende: Bei abgenommenem Behälterdeckel 5 sind die Filterelemente 1 an ihrer freiliegenden oberen Stirnseite 37 zugänglich. Nach Lösen der Mutter 33, die den Haltebügel 41 in der in den Figuren gezeigten, an die Stirnseite 37 angelegten Stellung hält, ist der betreffende Haltebügel 41 durch Schwenken um die Achse des Scharniers 43 von der Stirnseite 37 abhebbar. Das Filterelement 1 kann nun nach oben herausgehoben werden. Nach Abheben des Haltebügels 41 und Aufheben der Anpreßkraft, die über den Sitz 15 auf den Filtertopf 9 übertragen wird, kann auch dieser, beispielsweise zum Zweck der Reinigung, nach oben bewegt werden, wobei sich die flanschartige Erweiterung 23 des Filtertopfes 9 von der Ringschulter 25 am Ringkörper 21 abhebt.The functioning of the exemplary embodiment is as follows: When the container lid 5 is removed, the filter elements 1 are accessible on their exposed upper end face 37. After loosening the nut 33, which holds the holding bracket 41 in the position shown in the figures, applied to the end face 37, the relevant holding bracket 41 can be lifted off the end face 37 by pivoting about the axis of the hinge 43. The filter element 1 can now be lifted upwards. After lifting the retaining bracket 41 and lifting the contact pressure, which is transmitted to the filter bowl 9 via the seat 15, the latter can also be moved upward, for example for the purpose of cleaning, the flange-like extension 23 of the filter bowl 9 moving away from the annular shoulder 25 on the ring body 21.

Um das Ausheben des Filtertopfes 9 zu erleichtern, ist jeder Filtertopf 9 mit einem Tragbügel 47 versehen, der in hochgezogenen Seitenrandabschnitten 49, die am Filtertopf 9 am oberen Ende 11 einander gegenüberliegend ausgebildet sind, schwenkbar gelagert ist.In order to facilitate the lifting out of the filter bowl 9, each filter bowl 9 is provided with a support bracket 47 which is pivotally mounted in raised side edge sections 49 which are formed opposite one another on the filter bowl 9 at the upper end 11.

Die Innenseiten der Schlitzöffnungen 46 jedes Haltebügels 41 bilden Anschlagflächen, die in Zusammenwirkung mit den in sie eingreifenden Zungen 40 des Filterelements 1 eine Verdrehsicherung für dieses bilden, um eine Drehung des Filterelementes 1 um seine Längsachse zu verhindern.The inner sides of the slot openings 46 of each retaining bracket 41 form stop surfaces which, in cooperation with the tongues 40 of the filter element 1 engaging in them, form an anti-rotation device for the latter in order to prevent rotation of the filter element 1 about its longitudinal axis.

Wie aus Fig.1 zu ersehen ist, kann der Durchbruch 19 in der Innenwand 17 des Tanks 3 etwas größer ausgebildet sein als der Durchmesser der Ringöffnung des Ringkörpers 21. Somit bildet lediglich der Ringkörper 21 die eigentliche Aufnahme, in der der Filtertopf 9 unter Bildung der Abdichtung aufgenommen ist. Es braucht daher lediglich der Ringkörper 21 besonders genau bearbeitet und positioniert zu sein.As can be seen from FIG. 1, the opening 19 in the inner wall 17 of the tank 3 can be made somewhat larger than the diameter of the ring opening of the ring body 21. Thus only the ring body 21 forms the actual receptacle in which the filter bowl 9 is formed the seal is included. Therefore, only the ring body 21 needs to be machined and positioned particularly precisely.

Beim gezeigten Ausführungsbeispiel ist die zur Sicherung des Haltebügels 41 in der an die Stirnseite 37 des Filterelementes 1 angelegten Arbeitsstellung dienende Mutter 33, ebenso wie die den Ringkörper 21 festlegenden Muttern, als normale Sechskantmutter ausgebildet. Diejenige Mutter, die für das Abheben und Anlegen des Haltebügels 41 gelöst werden muß, kann jedoch auch durch eine Zusatzeinrichtung unverlierbar gesichert sein. Eine hierfür geeignete Ausführungsform wird weiter unten unter Bezug auf ein in Fig.4 gezeigtes Ausführungsbeispiel beschrieben.In the exemplary embodiment shown, the nut 33 used to secure the retaining bracket 41 in the working position applied to the end face 37 of the filter element 1, like the nuts fixing the ring body 21, is designed as a normal hexagon nut. That mother, which has to be loosened for lifting and putting on the holding bracket 41, can, however, also be secured captively by an additional device. An embodiment suitable for this is described below with reference to an exemplary embodiment shown in FIG.

Anstatt den Haltebügel 41 an einem Ende über ein Scharnier 43 am Ringkörper 21 schwenkbar zu lagern, könnte der Haltebügel auch an beiden Enden an je einem Halteelement des Ringkörpers 21 festgelegt sein.Instead of pivotally mounting the retaining bracket 41 at one end via a hinge 43 on the ring body 21, the retaining bracket could also be fixed to a retaining element of the ring body 21 at both ends.

In diesem Falle wären anstelle der gezeigten drei Gewindebolzen 31, die um 120 Winkelgrad zueinander versetzt angeordnet sind, vier in 90°-Abständen voneinander angeordnete Halteelemente vorgesehen.In this case, instead of the three threaded bolts 31 shown, which are arranged offset by 120 angular degrees from one another, four holding elements arranged at 90 ° intervals would be provided.

Das in Fig.3 gezeigte Ausführungsbeispiel unterscheidet sich vom erstbeschriebenen Ausführungsbeispiel lediglich durch die Ausbildung der Haltevorrichtung, die das Filterelement 1 und den Filtertopf 9 sichert. Diese Haltevorrichtung weist anstelle eines am Ringkörper 21 und/oder den als Halteelemente dienenden Gewindebolzen 31 festgelegten Andrückgliedes ein am oberen Behälterdeckel 5 an dessen Innenseite befestigtes Andrückglied in Form eines Druckstückes 51 auf. Bei der geschlossenen Stellung des Behalterdeckels 5 wirkt das Druckstück 51 auf den ihm gegenüberliegenden Vorsprung 39 des Filterelementes 1 zentrierend ein. Vom Druckstück 51 außerhalb der Stirnfläche des Vorsprungs 39 vorspringende Nasen 52 nehmen die Zungen 40 an der Stirnseite 37 des Filterelementes 1 in einer Schlitzöffnung 50 zwischen sich auf, um die Verdrehsicherung für das Filterelement 1 zu bilden.The exemplary embodiment shown in FIG. 3 differs from the first described exemplary embodiment only in the design of the holding device which secures the filter element 1 and the filter bowl 9. Instead of a pressing member fixed to the ring body 21 and / or the threaded bolt 31 serving as holding elements, this holding device has a pressing member in the form of a pressure piece 51 fastened to the inside of the upper container lid 5. When the container cover 5 is in the closed position, the pressure piece 51 acts in a centering manner on the projection 39 of the filter element 1 lying opposite it. Noses 52 projecting from the pressure piece 51 outside the end face of the projection 39 receive the tongues 40 on the end face 37 of the filter element 1 in a slot opening 50 between them in order to form the anti-rotation device for the filter element 1.

Fig.4 zeigt ein Ausführungsbeispiel mit einer Haltevorrichtung, deren Andrückglied wie bei dem Beispiel von Fig.1 und 2 als Haltebügel 41 ausgebildet ist. Die für das Abheben des Haltebügels 41 zu lösende Mutter ist hierbei nicht als Sechskantmutter ausgebildet, sondern eine Spezialmutter 55, die mit einer ringförmigen Handhabe 53 versehen ist, so daß sie wie eine Flügelmutter manuell drehbar ist. Zusätzlich ist die Mutter 55 mittels einer Sicherungskette 57 unverlierbar gesichert. Ein Ende der Kette 57 ist am Haltebügel 41 befestigt. Das andere Ende der Kette 57 ist an einer Ringscheibe 58 festgelegt, die sprengringartig, jedoch verdrehbar, in einer Ringnut der Mutter 55 sitzt.4 shows an embodiment with a holding device, the pressing member of which is designed as a holding bracket 41 as in the example of FIGS. 1 and 2. The nut to be loosened for lifting the retaining bracket 41 is not designed here as a hexagon nut, but rather a special nut 55 which is provided with an annular handle 53 so that it can be rotated manually like a wing nut. In addition, the nut 55 is captively secured by means of a safety chain 57. One end of the chain 57 is attached to the bracket 41. The other end of the chain 57 is fixed to an annular disc 58 which, like a circlip but rotatable, sits in an annular groove in the nut 55.

Fig.5 bis 7 zeigen ein Ausführungsbeispiel, bei dem als Aufnahmekörper, in dem der Filtertopf 9 mit seiner endseitigen, flanschartigen Erweiterung 23 aufgenommen ist, kein Ringkörper aus Metall, sondern ein Ringkörper 61 aus glasfaserverstärkten Kunststoff vorgesehen ist. In gleicher Weise wie bei den zuvor beschriebenen Ausführungsbeispielen, sind als Halteelemente für den Ringkörper 61 Gewindebolzen 31 mit Muttern 33 vorgesehen. Der Ringkörper 61 weist für die Abdichtung gegenüber der Innenwand 17 nicht nur einen Dichtring 35, entsprechend den zuvor beschriebenen Ausführungsbeispielen, auf, sondern der Ringkörper 61 bildet mit seinem verjüngten außenliegenden Umfangsbereich eine Dichtlippe 62, die unter Vorspannung an der Innenwand 17 anliegt.5 to 7 show an embodiment in which there is none as the receiving body in which the filter bowl 9 is received with its end-like, flange-like extension 23 Ring body made of metal, but an annular body 61 made of glass fiber reinforced plastic is provided. In the same way as in the previously described exemplary embodiments, threaded bolts 31 with nuts 33 are provided as holding elements for the annular body 61. The annular body 61 not only has a sealing ring 35 for the sealing against the inner wall 17, in accordance with the previously described exemplary embodiments, but the annular body 61 forms with its tapered outer peripheral region a sealing lip 62 which bears against the inner wall 17 under prestress.

Die Haltevorrichtung weist als Andrückglied einen Haltebügel 71 auf, der, wie der Ringkörper 61, aus glasfaserverstärktem Kunststoff besteht und mit seinem einen Ende mittels der Mutter 33 an einem der Gewindebolzen 31 festgelegt ist. Der dieser Anbringstelle benachbarte Bereich des Haltebügels 71 ist ausreichend biegbar, um ein Biegescharnier 64 zu bilden, so daß der Haltebügel zum Anlegen an die Stirnseite 37 des Filterelementes 1 und zum Abheben davon schwenkbar ist. Das dem Biegescharnier 64 entgegengesetzte Ende des Haltebügels 71 ist an zugeordneten, hochgezogenen Randabschnitt 72 des Ringkörpers 61 mittels einer Steckfeder 73 festlegbar. Diese ist in etwa haarnadelförmig gebogen und weist einen geraden Federschenkel 74 auf, der in Öffnungen 75 und 76 im Haltebügel 71 bzw. im Ringkörper 61 einsteckbar ist, wie es Fig.6 zeigt. Diese Figur zeigt auch, daß der zweite Federschenkel 77 in eine Nut 78 des Haltebügels 71 eingreift, wobei er mit Federkraft an dem Grund der Nut klemmend anliegt, so daß die Steckfeder 73 im eingesteckten Zustand kraftschlüssig gesichert ist.The holding device has as a pressing member a holding bracket 71 which, like the ring body 61, is made of glass fiber reinforced plastic and is fixed at one end to one of the threaded bolts 31 by means of the nut 33. The area of the mounting bracket 71 adjacent to this attachment point can be bent sufficiently to form a bending hinge 64, so that the mounting bracket can be pivoted for placement against the end face 37 of the filter element 1 and for lifting it off. The end of the holding bracket 71 opposite the bending hinge 64 can be fixed on the associated, raised edge section 72 of the ring body 61 by means of a plug-in spring 73. This is bent approximately into a hairpin shape and has a straight spring leg 74 which can be inserted into openings 75 and 76 in the holding bracket 71 or in the ring body 61, as shown in FIG. This figure also shows that the second spring leg 77 engages in a groove 78 of the bracket 71, wherein it rests with spring force on the bottom of the groove, so that the plug spring 73 is non-positively secured in the inserted state.

In dem Bereich zwischen seinen beiden Enden ist der Haltebügel 71 so geformt wie der Haltebügel 41 beim erstbeschriebenen Beispiel, d.h. er weist eine zentrale Ausnehmung 45 für die Aufnahme des Vorsprungs 39 des Filterelements 1 auf sowie in die Ausnehmung 45 mündende Schlitzöffnungen 46, in die die Zungen 40 des Filterelements 1 eingreifen, so daß eine Verdrehsicherung gebildet wird.In the area between its two ends, the holding bracket 71 is shaped like the holding bracket 41 in the first described example, ie it has a central recess 45 for the reception of the projection 39 of the filter element 1 and slot openings 46 opening into the recess 45, into which the tongues 40 of the filter element 1 engage, so that an anti-rotation device is formed.

Fig.8 zeigt ein Ausführungsbeispiel, bei dem der Haltebügel 71 mit dem zugeordneten, hochgezogenen Randabschnitt des Ringkörpers 61 mittels einer Schnappsicherung verbunden ist. Diese besteht aus einer Riegelfläche 82 am Ringkörper 61, die durch einen Riegelvorsprung an einer biegsamen Riegelnase 83 des Haltebügels 71 hintergriffen wird, wenn der Haltebügel 71 in die in Fig.8 gezeigte Riegelstellung gebracht wird. In dieser Riegelstellung ist der Rand des Ringkörpers 71 zwischen der Riegelnase 83 und einem Widerlager 84 aufgenommen, das am Haltebügel 71 angeformt ist. Das Lösen des Riegeleingriffs erfolgt durch Aufbringen einer Kraft in Abheberichtung am äußeren Ende 85 des Haltebügels 71, wobei sich aufgrund der Abstützung am Widerlager 84 lediglich der äußere Endabschnitt des Haltebügels 71 verbiegt, so daß die Riegelnase 83 mit ihrem Vorsprung außer Eingriff mit der Riegelfläche 82 kommt.8 shows an exemplary embodiment in which the holding bracket 71 is connected to the associated raised edge section of the ring body 61 by means of a snap lock. This consists of a locking surface 82 on the ring body 61, which is engaged by a locking projection on a flexible locking lug 83 of the retaining bracket 71 when the retaining bracket 71 is brought into the locking position shown in FIG. In this locking position, the edge of the ring body 71 is received between the locking lug 83 and an abutment 84, which is integrally formed on the bracket 71. The locking engagement is released by applying a force in the lifting direction at the outer end 85 of the holding bracket 71, whereby only the outer end portion of the holding bracket 71 bends due to the support on the abutment 84, so that the locking lug 83 with its projection out of engagement with the locking surface 82 is coming.

Fig.9 zeigt ein Ausführungsbeispiel, bei dem das dem Biegescharnier entgegengesetzte Ende des Haltebügels 71 auf einem der Gewindebolzen 31 mittels einer Rändelmutter 91 festgelegt ist. Die Rändelung am Umfang der Rändelmutter 91 ist mit einer Rastzunge 92 im Eingriff, die an der Oberseite des Haltebügels 71 angeformt ist und aufgrund ihrer Flexibilität eine kraftschlüssige Verdrehsicherung für die Rändelmutter 91 bildet.FIG. 9 shows an embodiment in which the end of the holding bracket 71 opposite the bending hinge is fixed on one of the threaded bolts 31 by means of a knurled nut 91. The knurling on the circumference of the knurled nut 91 engages with a latching tongue 92, which is formed on the upper side of the holding bracket 71 and, due to its flexibility, forms a non-positive locking device for the knurled nut 91.

Die vorstehende Beschreibung und die Zeichnung beschränken sich nur auf die Angabe von Merkmalen, die für die beispielsweise Verkörperung der Erfindung wesentlich sind.The above description and the drawing are limited to the specification of features which are essential for the embodiment of the invention, for example.

Soweit daher Merkmale in der Beschreibung und in der Zeichnung offenbart und in den Ansprüchen nicht genannt sind, dienen sie erforderlichenfalls auch zur Bestimmung des Gegenstandes der Erfindung.To the extent that features are disclosed in the description and in the drawing and are not mentioned in the claims, they also serve, if necessary, to determine the subject matter of the invention.

Claims (6)

Vorrichtung zur Aufnahme eines Filterelementes (1) in einem Gehäuseteil (9), der eine Eintritts- und Austrittsöffnung für ein Fluid und an letzterer einen Sitz (15) aufweist, an den das Filterelement (1) mittels einer Haltevorrichtung andrückbar ist, die ein an eine Anlagefläche des Filterelementes (1) anlegbares Andrückglied (41; 51) aufweist, wobei ein Dichtelement (16) am Sitz (15) das ungefilterte Fluid vom gefilterten trennt und der Gehäuseteil (9) mit einem Bereich (25) seiner Außenwandung über ein zweites Dichtelement (27) dichtend in Anlage mit einem Aufnahmekörper (21) ist, der mittels eines dritten Dichtelementes (35) und zugehöriger Halteelemente (31, 33) in abdichtender Verbindung an einer Wand (17) eines Behälters (3) befestigbar ist, dadurch gekennzeichnet, daß das Andrückglied (41; 51) der Haltevorrichtung mindestens eine Anschlagfläche (46) aufweist, die in einen formschlüssigen Eingriff mit einer an der Anlagefläche des Filterelementes (1) ausgebildeten Gegenfläche (40) bringbar ist, um eine Sicherung des Filterelementes (1) gegen Verdrehung relativ zum Gehäuseteil (9) zu bilden.Device for accommodating a filter element (1) in a housing part (9), which has an inlet and outlet opening for a fluid and on the latter a seat (15) to which the filter element (1) can be pressed by means of a holding device which presses on A contact surface of the filter element (1) can be pressed on (41; 51), a sealing element (16) on the seat (15) separating the unfiltered fluid from the filtered one and the housing part (9) with a region (25) of its outer wall via a second one Sealing element (27) is sealingly in contact with a receiving body (21) which can be fastened in a sealing connection to a wall (17) of a container (3) by means of a third sealing element (35) and associated holding elements (31, 33), characterized in that that the pressing member (41; 51) of the holding device has at least one stop surface (46) which engages in a form-fitting manner with one on the contact surface of the filter element (1) n counter surface (40) can be brought in order to secure the filter element (1) against rotation relative to the housing part (9). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Anschlagfläche am Andrückglied (41; 51) durch die Ränder mindestens einer an ihm vorgesehenen Schlitzöffnung (46; 50) gebildet ist, die für den Eingriff einer an der Anlagefläche des Filterelementes (1) vorgesehenen, vorspringenden Zunge (40) bestimmt ist, die die Gegenflächen bildet.Device according to claim 1, characterized in that the abutment surface on the pressure member (41; 51) is formed by the edges of at least one slot opening (46; 50) provided thereon for engaging one provided on the contact surface of the filter element (1). projecting tongue (40) is determined, which forms the counter surfaces. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Andrückglied (41) der Haltevorrichtung mit mindestens einem der Halteelemente (31, 33) oder dem Aufnahmekörper (21; 61) verbindbar ist.Apparatus according to claim 1 or 2, characterized in that the pressing member (41) of the holding device can be connected to at least one of the holding elements (31, 33) or the receiving body (21; 61). Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Andrückglied einen Haltebügel (41;71) aufweist, der über einen Verbindungsteil mit dem Aufnahmekörper (21; 61) verbindbar ist.Device according to one of claims 1 to 3, characterized in that the pressing member has a holding bracket (41; 71) which can be connected to the receiving body (21; 61) via a connecting part. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Verbindungsteil aus einer scharnierartigen Anordnung (43; 64) gebildet ist.Device according to claim 4, characterized in that the connecting part is formed from a hinge-like arrangement (43; 64). Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Behälter (3) einen Behälterdeckel (5) aufweist, der für das Einsetzen und Herausnehmen des Gehäuseteils (9) und/oder des Filterelementes (1) vom Behälter (3) abhebbar ist, und daß dieser Behälterdeckel (5) an seiner Innenseite das Andrückglied (51) der Haltevorrichtung aufweist.Device according to claim 1 or 2, characterized in that the container (3) has a container lid (5) which can be lifted off the container (3) for the insertion and removal of the housing part (9) and / or the filter element (1), and that this container lid (5) has on its inside the pressing member (51) of the holding device.
EP91118867A 1990-12-08 1991-11-06 Apparatus for the incorporation of a filter element Expired - Lifetime EP0490080B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4039192 1990-12-08
DE4039192A DE4039192C1 (en) 1990-12-08 1990-12-08

Publications (2)

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EP0490080A1 true EP0490080A1 (en) 1992-06-17
EP0490080B1 EP0490080B1 (en) 1995-05-24

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ID=6419867

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EP91118867A Expired - Lifetime EP0490080B1 (en) 1990-12-08 1991-11-06 Apparatus for the incorporation of a filter element

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US (1) US5200067A (en)
EP (1) EP0490080B1 (en)
JP (1) JPH0647046B2 (en)
DE (2) DE4039192C1 (en)

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Also Published As

Publication number Publication date
JPH0647046B2 (en) 1994-06-22
US5200067A (en) 1993-04-06
DE59105581D1 (en) 1995-06-29
EP0490080B1 (en) 1995-05-24
DE4039192C1 (en) 1992-07-30
JPH04267906A (en) 1992-09-24

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